Abstract

The present status of the specialized RF linac for the IR FEL project at P.N. Lebedev Physical Institute designed for 20–25 MeV energy and up to 300 A peak current in 100–200 μs long train pulses is described. The accelerator is based on the scheme of a number of independently fed cavities operating at 150 MHz frequency and an RF photocathode gun with a UV laser driver with active mode synchronization. The initial part of the accelerator for 4 MeV has been constructed and now is under test. Results of previous experiments with low-current test beam and modelling of the high-current short-pulse beam behaviour are presented.

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